Aon plc — Director's Dealing 2010

May 10, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AOC)
CIK: 0000315293
Period of Report: 2010-05-07

Reporting Person: KALFF JAN (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-07	Common Stock	S	4000	$40.85	Disposed	3524	Direct

Footnotes

F1: Includes shares of common stock acquired pursuant to dividend reinvestment.